Heater.



J. P. CO'I'TRELL. HEATER. APPLIcATxoN HLBD Aus. 8, 1908.

951,677.H Patend Mar'.8,1910.

attovmu JAMES F. COTTRELL, OF EAST BOSTON, MASSAGHUSETTS.

HEATER. i

specification of Letters `Patent.

AppIicationifiled August 8, 1908.` Serial No. 447,564.

e To alt whom tt may concem;

Be it known that I,`JAMEs F. CoTrRELL, a citizen of the United` States, residing i at East Boston, in the county of Sufi'olk and State of Massachusetts, haveinvented new and useful Improvements in Heaters,` of which the following is alspecification.

This invention relates to heaters, and more especially to hot water or steam heaters, and the object ofthe invention being to soconstruct the same that the hot gases and products of combustion will-be caused to circulate so as to give off their heat and in circulating around an intermediate section `;or dome of a peculiar construction adapted for the reception of water so as to thoroughly heat the water in the intermediate section or dome as well`` as the water contained within the outer section surrounding the dome. i i

Another object of the invention is to provide an ash pit having a combustion chamber positioned immedi-ately above the same, the ash pit being adapted for the reception of an intermediatesection or dome of peculiar construction andan outer jacket surrounding the dome,` the ash pit being provided with an upper box or Vflue communicating with the fluepositioned between the inner and outer chambers, the construction being so arranged that the productsof combustion pass between and surround the inner and outer Sections and passed downward through the ash'pit through a suitable Outlet pipe,`

thereby thoroughly heating the inner and outer .Sections of the furnace. i

A still further object of the invention is to provide a furnace with an ash pit having an upper ;box or flue extending entirely around its perimeter, and being provided with openings communicating between an outer jacket and an intermediate domecontained within the outer jacket, the said dome being provided with a centrally downwardly extending portion arranged at angles with the sides thereof and also having a smaller dome positioned between the top of the main dome and the top of the outer `jacket, this intermediate dome or chamber being constructed ofihollow arms arranged at different angles from the centrally downwardly extending' portion of the main dome, whereby the products of'combustion may have free accessto the domes within the outer jacket and whereby the said products oficombus-` tion may be free to circulate upwardly and to ``have access through a suitable pipe pro- 'videdwithin the box or flue of the ash pit.

VVith these and other objects in view the invention resides in the novel construction and arrangement of parts hereinafter fully described and claimed.

In the accompanying drawing, Figure 1 is a Vertical central longitudinal sectional view taken through a furnace in accordance with the present invention. Fig. 2 is a horizontal sectional view upon the line 2-2 of Fig. 1. Fig. 3 is a view upon the line 3-3 of Fig. 1. Fig. 4 is a top plan view of the ash pit, the remainder of the furnace being removed.

In the accompanying drawings, the nulmeral 1 designates the ash pit of the improved furnace.` This ash pit 1 has its upper portion provided with a box or fiue 2, extending around its entire perimeter. This box 2 has its upper wall provided with cutaway portions, as indicated by the numeral 3 and more clearly indicated in Fig. 11 of the drawings, the purpose of which will hereinafter be more fully described. The ash pit 1 is provided with the ordinary Outlet door 4 and is also provided at its upper extremity with a plurality-of spaced lugs or ears 5. These lugs 5 are each provided with a suitably` disposed aperture and are adapted to coincide withsimilar ears or lugs 6 provided upon the outer jacket 7 of the furnace. This outer jacket 7 is of a size corresponding with the outer portion of the ash pit 1 upon which it is adapted to rest and at which it is secured through the medium of suitable retaining elements S engaging the perforations provided by the lugs 5 and 6. The jacket `7 coniprises inner andouter spaced walls extending around its entire perimeter and at the top` of the same as clearly illustrated in Fig. 1 of the drawings. The top of the jacket 7 has its upper wall provided with a plurality of steam or hot water outlets, as indicated by the numeral 9, while the inner or lower wall of the top portion of thejacket is provided with a centrally arranged depending flanged pipe member 10. This flanged member 10 is adapted to be secured to an intermediate dome section 11. This dome` section 11 is constructed of a pair of radiating arms centrally intersecting themselves and communi- Patented Mar. 8, 1910.

cating with tlle jacket 7, as clearly illustrated in F ig. 2 of the drawings. The dolne 11 is also provided with a downwardly extending flanged portion which is adapted to be secured to all upwardly 1:rojecting` fianged pipe connected with the top of the dolne proper of the furnace. ranged in suitable spaced relation witll regard to the outer jacket 7 and colnprises a pair of downwardly extending,` walls adapted to be positioned upon the upper wall of the ash pit 1 and to rest upon the top wall provided by the box 2 thereof. The dowllwardly extending,` portion of the dolne 12 llas its outer wall positioned adjacent the inner wall of the box 2, while the inner wall of the jacket 7 is positioned adjacent the outer wall of the cutaway pol'tions or fi'ues 3 of the box 2, tllus pl'oviding` a space between the inner wall of the outer jacket alld the outer wall of the dolne 12 as wellas providing a collllnunication between these lnelnbers and the box 2 of the asll pit. The lower portion of the dolne 12 is provided with a suitable water olltlet pipe 13, as clearly illustrated in Fig. 1 of the drawings.

Positioned upon the top of the ash pit 1 within the colnbustion chamber provided by the dolne 12, is a suitable grate 14 wllich is adapted for the receptioll of the fllel by which the furnace is operated, a suitable lnoutll or cllute 15 being provided between the acket 7 and the dolne 12, as clearly illustrated in Fig. 1 of the drawings, and said chute or opening is adapted to be normally closed by the door 16. The colnbustioll chamber'17 is provided with a plurality of outlet openings 18 communicating between the jacket 7 and the domes 11 and 12 whereby the products of combustion have free access between these melnbers alld whereby the salne is directed upwardly so that the water contained within the jacket and the domes is thoroughly heated before the said products of colnbustion are directed downwardly through the openings 3 within the box 2 of the 'ash pit 1, and thence through the opening 19 into the outlet pipe 20, as shown in Fig. l of the drawings.

Secured integrally to the dolne 12 imlnediately above the cllute 15 and opening's 18 are the centrally arranged downwardly extending spaced walls or jackets 21. These walls vor jackets 21 are adapted to ,extend downwardly at all angle to each other and to intersect each other as clearly illustrated in F ig. 2 of the drawings. It will be noted 'by reference to Fig's. 2 and 3 of the drawings that the angularly extending melnbers 11 and 21 of the interlnediate and prillcipal 'domes are arranged at a direct ang'le in relation to each other, and it will be noted by this arrangement that a greater alnount of heating serv1ce ls provlded as the products This dolne 1-2 is al'- of colnbustion froln the chalnber 17 extelld upwardly against tlle offset dependin;` bosses lol' lnelnbers 21 and tllence through the openings 18 into contact with the arms or cllalnbers provided by the intermediate dolne or section 11.

lhile I have illustrated and described the preferred elnbodilnent of the inventioll, it is to be understood that minor details of construction within the scope of the following clailns may be resorted to without departing from or sacrificing any of the advant-ages of the invention.

vI claim:

1. In a furnace of the class set forth, all ash pit, an outer water jacket upon the ash pit, said outer jacket being provided with outlet openings, a central dolne l'estillb` upoll the asll pit in spaced relation witll the outer jacket, an intermediate dolne colnmunicating` with the lnain donle and the outer jacket, and all outlet for the products of colnbustion provided by the asll pit.

2. Ill a furllace of the class descl'ibed, all asll pit, a box provided upon the upper portion'of the ash pit and extendinl around the perilneter thereof, said box being provided with fiues or openings, all outer water jacket positioned upon the box and being provided with outlets, an inner water dolne 'positioned upon the top of the ash pit in spaced relation frolll tlle jacket, all interlnediate dolne or challlber connectinfc,r the lllain dolne with the top of the water jacket, a grate resting upon the top of the ash pit within the main dollle, a cllute collnecting the illterior of the dolne with the exterior of the furnace, said lnain dolne being provided with openings colnlnullicating` with the spaces between the dolne and the jacket, and the box of the asll pit being provided with all opening for the outlcts of the products of colllbllstioll.

3. In a heater of the character set fortll, an asll pit, a box formed integrally with said ash pit and extending around the entire perilneter tllereof, fiue openings witllin the upper wall of the box, a water jacket, all inverted U-shaped structure upon the box of the ash pit, outlet openings for the jacket, an inner water dolne comprising all invel'ted U-shaped member positioned upon the upper wall of the box of the ash pit ill spaced relation with the outer jacket and communicating with the lines provided by the box of the asll pit, outlct pipes collllected witll the dolne, a. grate within the dolne, a feed chute communicating` with the grate, a plurality of openings communicating` with the passage between the colnbustion chamber provided within the dolne and the outer jacket, the said dolne being' provided with downwardly extending portiolls arranged at an angle and communicating` with the sides ranged at a d1 of the dolne, an intermediate dolne or ehamadapted to serve as an exit for the products bei' connecting the main dome With the top of combustion. 10 of the outer jacket, said Chamber being pro- In testimony Whereof I affix my signature Vided with op ositeiy disposed arms arin presence of two Witnesses.

'firent angle from the down- JAMES F. COTTRELL.

Wardly projecting portions upon the interior of the main dome, and the box of the ash pit being provided With an opening Witnesses:

WILLIAM HENDERSON, WILLIAM J. CAREY. 

